Polyethylene
is odorless, non-toxic, feels like wax, has excellent low temperature
resistance (the minimum use temperature can reach - 70~- 100 ℃), good
chemical stability, can withstand the corrosion of most acids and
alkalis (not resistant to acids with oxidizing properties), insoluble in
general solvents at room temperature, low water absorption, and
excellent electrical insulation performance;
However, polyethylene is
very sensitive to environmental stress (chemical and mechanical effects)
and has poor heat aging resistance.
The properties of polyethylene vary from variety to variety, mainly depending on the molecular structure and density.
Specific gravity: 0.94-0.96g/cm3.
Molding shrinkage: 1.5-3.6%